Advancing material of indeterminate length – By orbitally traveling material-engaging surface – With control or adjustment means
Patent
1996-10-11
1998-04-14
Mansen, Michael
Advancing material of indeterminate length
By orbitally traveling material-engaging surface
With control or adjustment means
226 45, 226100, 226187, B65H 2000, B65H 2600
Patent
active
057382646
ABSTRACT:
Web feed apparatus, for example in web printing and folding apparatus, has a pair of opposing rollers, one (28) on a fixed axis and one (22) laterally movable to define an adjustable nip gap between their peripheries. The gap is automatically set and adjusted by a setting screw (4) driven by a servo motor (60) with rotation of the screw monitors by a potentiometer sensor (64). A stop collar (52) on the screw limits axial displacement thereof to determine the set nip gap and a spring (50) urges the rollers towards each other but permits displacement under overload conditions. A rectilinear sensor (54) senses said conditions by monitoring relative displacement of the stop collar and a programmable control system processes signals from the sensors and operates the servo motor accordingly.
REFERENCES:
patent: 2796781 (1957-06-01), Mills
patent: 3147901 (1964-09-01), Nordman et al.
patent: 3625509 (1971-12-01), Claybourn
patent: 3964657 (1976-06-01), Lenk et al.
patent: 4060187 (1977-11-01), Grob
patent: 4491929 (1985-01-01), Ikoma et al.
Donaldson Peter A.
Jackson John C.
Sharples Ian A.
Goss Graphic Systems Inc.
Mansen Michael
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